<template>
    <div>
        <div class="shopcart">
            <div class="content">
                <div class="content-left" @click="toShow">
                    <div class="logo-wrapper">
                        <div class="logo" :class="{highlight:totalNumber}">
                            <i class="iconfont icon-shopping_cart " :class="{highlight:totalNumber}"></i>
                        </div>
                        <div class="num" v-if="totalNumber">{{totalNumber}}</div>
                    </div>
                    <div class="price highlight" >￥{{totalPrice?totalPrice:0}}</div>
                    <div class="desc">另需配送费￥{{info.deliveryPrice}}元</div>
                </div>
                <div class="content-right">
                    <div class="pay" :class="{enough:payText==='结算',notenough:payText!=='结算'}" >
                        {{payText}}
                    </div>
                </div>
            </div>
                <div class="shopcart-list" v-show="listShow">
                    <div class="list-header">
                        <h1 class="title">购物车</h1>
                        <span class="empty" @click="clearCart">清空</span>
                    </div>
                    <div class="list-content">
                        <ul>
                            <li class="food" v-for="(food, index) in cartFoods" :key="index">
                                <span class="name">{{food.name}}</span>
                                <div class="price"><span>￥{{food.count*food.price}}</span></div>
                                <div class="cartcontrol-wrapper">
                                    <CartControl :food="food"></CartControl>
                                </div>
                            </li>
                        </ul>
                    </div>
                </div>

        </div>
        <div class="list-mask" v-show="listShow" @click="toShow"></div>
    </div>
</template>

<script>
    import {mapState,mapGetters} from 'vuex'
    import { MessageBox } from 'mint-ui'
    import CartControl from '../../components/CartControl/CartControl'
    import BScroll from "@better-scroll/core";
    export default {
        name: "ShopCart",
        components:{
            CartControl
        },
        data() {
            return {
                isShow:false
            };
        },
        computed: {
            ...mapState(['cartFoods','info']),
            ...mapGetters(['totalPrice','totalNumber']),

            payText () {
                const {totalPrice} = this;
                const {minPrice} = this.info;
                if(totalPrice===0) {
                    return `￥${minPrice}元起送`
                } else if(totalPrice<minPrice) {
                    return `还差￥${minPrice-totalPrice}元起送`
                } else {
                    return '结算'
                }
            },

            listShow: {

                get: function () {

                    if (this.totalNumber===0) {
                        return  false
                    }
                    if(this.isShow) {
                        this.$nextTick(() => {
                            // 实现BScroll的实例是一个单例
                            if(!this.scroll) {
                                this.scroll = new BScroll('.list-content', {
                                    click: true
                                })
                            }else {
                                this.scroll.refresh() // 让滚动条刷新一下: 重新统计内容的高度
                            }
                        })
                    }
                    return this.isShow;
                },
            }

        },
        methods: {
            toShow(){
                if (this.totalNumber>0){
                    this.isShow=!this.isShow
                }
            },
            clearCart(){
                MessageBox.confirm('确定清空购物车吗?').then(() => {
                    this.$store.dispatch('clearCart')
                }, () => {});
               this.isShow=false
            }
        },
        created() {
        },
        mounted() {
        },
        watch:{
            totalNumber:function () {
                if (this.totalNumber===0) {
                    this.isShow=false
                }
            }
        }
    }
</script>

<style lang="stylus" rel="stylesheet/stylus">
    @import "../../common/stylus/mixins.styl"

    .shopcart
        position fixed
        left 0
        bottom 0
        z-index 50
        width 100%
        height 48px
        .content
            display flex
            background #141d27
            font-size 0
            color rgba(255, 255, 255, 0.4)
            .content-left
                flex 1
                .logo-wrapper
                    display inline-block
                    vertical-align top
                    position relative
                    top -10px
                    margin 0 12px
                    padding 6px
                    width 56px
                    height 56px
                    box-sizing border-box
                    border-radius 50%
                    background #141d27
                    .logo
                        width 100%
                        height 100%
                        border-radius 50%
                        text-align center
                        background #2b343c
                        &.highlight
                            background $green
                        .icon-shopping_cart
                            line-height 44px
                            font-size 24px
                            color #80858a
                            &.highlight
                                color #fff
                    .num
                        position absolute
                        top 0
                        right 0
                        width 24px
                        height 16px
                        line-height 16px
                        text-align center
                        border-radius 16px
                        font-size 9px
                        font-weight 700
                        color #ffffff
                        background rgb(240, 20, 20)
                        box-shadow 0 4px 8px 0 rgba(0, 0, 0, 0.4)
                .price
                    display inline-block
                    vertical-align top
                    margin-top 5px
                    line-height 24px
                    padding-right 12px
                    box-sizing border-box
                    font-size 16px
                    font-weight 700
                    color #fff
                    &.highlight
                        color #fff
                .desc
                    display inline-block
                    vertical-align bottom
                    margin-bottom 15px
                    margin-left -45px
                    font-size 10px
            .content-right
                flex 0 0 105px
                width 105px
                .pay
                    height 48px
                    line-height 48px
                    text-align center
                    font-size 12px
                    font-weight 700
                    color #fff
                    &.notenough
                        background #2b333b
                    &.enough
                        background #00b43c
                        color #fff
        .ball-container
            .ball
                position fixed
                left 32px
                bottom 22px
                z-index 200
                transition all 0.4s cubic-bezier(0.49, -0.29, 0.75, 0.41)
                .inner
                    width 16px
                    height 16px
                    border-radius 50%
                    background $green
                    transition all 0.4s linear
        .shopcart-list
            position absolute
            left 0
            top 0
            z-index -1
            width 100%
            transform translateY(-100%)
            &.move-enter-active, &.move-leave-active
                transition transform .3s
            &.move-enter, &.move-leave-to
                transform translateY(0)
            .list-header
                height 40px
                line-height 40px
                padding 0 18px
                background #f3f5f7
                border-bottom 1px solid rgba(7, 17, 27, 0.1)
                .title
                    float left
                    font-size 14px
                    color rgb(7, 17, 27)
                .empty
                    float right
                    font-size 12px
                    color rgb(0, 160, 220)

            .list-content
                padding 0 18px
                max-height 217px
                overflow hidden
                background #fff
                .food
                    position relative
                    padding 12px 0
                    box-sizing border-box
                    bottom-border-1px(rgba(7, 17, 27, 0.1))
                    .name
                        line-height 24px
                        font-size 14px
                        color rgb(7, 17, 27)
                    .price
                        position absolute
                        right 90px
                        bottom 12px
                        line-height 24px
                        font-size 14px
                        font-weight 700
                        color rgb(240, 20, 20)
                    .cartcontrol-wrapper
                        position absolute
                        right 0
                        bottom 6px

    .list-mask
        position fixed
        top 0
        left 0
        width 100%
        height 100%
        z-index 40
        backdrop-filter blur(10px)
        opacity 0.7
        background rgba(7, 17, 27, 0.6)
        &.fade-enter-active, &.fade-leave-active
            transition all 0.5s
        &.fade-enter, &.fade-leave-to
            opacity 0
            background rgba(7, 17, 27, 0)
</style>
